Alternatives to Micro Sniff

Monitors and reports any microphone and camera activity

System monitor for the menu bar

Monitors computer mic and webcam

Audio utility

Utility to display the lid angle and play a creaking sound

Set of CPU, memory, disk, and network monitoring tools

Status monitoring

Sound and audio controller

Track all your devices' batteries

Analysis tool for security research and malware triage

Displays all open files and sockets in use by all running processes

Monitors common persistence locations